1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Bingel [31]
3 years ago
7

The reduction of iron(III) oxide (Fe203) to pure iron during the first step of steelmaking,

Chemistry
1 answer:
Anna71 [15]3 years ago
5 0

Answer:

The minimum mass of coke needed to produce 850 t is equal to 172223.4 kg

Explanation:

The balanced reaction for the formation of the is as follows:

2Fe + 3/2O2 = Fe2O3, ΔG = -830 kJ/mol

Fe2O3 = 2Fe + 3/2O2, ΔG = +830 kJ/mol

2Fe2O3 = 4Fe + 3O2, ΔG = (+830*2) = +1660 kJ/mol

the mass of iron = 850 ton = 850000 kg

the necessary energy will be equal to:

Energy = (1660*850000)/(4*56x10^-3) = 6.299x10^9 kJ

the energy released by 1 mole of CO2 is equal to 439 kJ/mol

mol of CO2 = 6.299x10^9/439 = 1.434x10^7 mol

now we will calculate the kilograms of coke that are required:

mass of coke = 1.434x10^7 mol * (12.01 g/mol) * (1 kg/1000 g) = 172223.4 kg

You might be interested in
An electrochemical cell is powered by the half reactions shown below.
andrezito [222]
Reduction reactions are those reactions that reduce the oxidation number of a substance. Hence, the product side of the reaction must contain excess electrons. The opposite is true for oxidation reactions. When you want to determine the potential difference expressed in volts between the cathode and anode, the equation would be: E,reduction - E,oxidation. 

To cancel out the electrons, the e- in the reactions must be in opposite sides. To do this, you reverse the equation with the negative E0, then replacing it with the opposite sign. 

Pb(s) --> Pb2+ +2e-      E0 = +0.13 V
Ag+ + e-  ---> Ag           E0 = +0.80 V

Adding up the E0's would yield an overall electric cell potential of +0.93 V.
7 0
3 years ago
One isotope of oxygen differs from another isotope of oxygen in *
Reptile [31]

Each isotope of Oxygen has a different number of neutrons

<h3>Further explanation </h3>

The elements in nature have several types of isotopes

Atomic mass is the average atomic mass of all its isotopes

Isotopes are atoms has the same number of protons but has a different number of neutrons.

So Isotopes are elements that have the same Atomic Number (Proton)

Some of the isotopes of oxygen are:

\tt _8^{16}O,_8^{17}O,_8^{18}O

Each isotope has 8 protons and 8 electrons but has a different number of neutrons

For O-16: number of neutrons = 16-8 = 8

For O-17: number of neutrons = 17-8 = 9

For O-18: number of neutrons = 18-8 = 10

4 0
3 years ago
Taro plants, which are native to Africa, were introduced into Florida's wetland biome in 1910. Today taro plants grow wild in th
Wewaii [24]
The answer would be b hope it helps
6 0
3 years ago
One gallon of water has a mass of 3.78kg. Water is 11.2% hydrogen by mass. Calculate the mass of hydrogen contained in this gall
olchik [2.2K]

Answer:

A model is developed for predicting oxygen uptake, muscle blood flow, and blood chemistry changes under exercise conditions. In this model, the working muscle mass system is analyzed. The conservation of matter principle is applied to the oxygen in a unit mass of working muscle under transient exercise conditions. This principle is used to relate the inflow of oxygen carried with the blood to the outflow carried with blood, the rate of change of oxygen stored in the muscle myoglobin, and the uptake by the muscle. Standard blood chemistry relations are incorporated to evaluate venous levels of oxygen, pH, and carbon dioxide.

Explanation:

8 0
3 years ago
In a homogeneous mixture, the liquid is the?
scoray [572]
<span>the solvent, hope this helps</span>
5 0
3 years ago
Read 2 more answers
Other questions:
  • What are  human made of
    5·2 answers
  • Which statements about the equation shown above are correct? Check all that apply. It represents a reaction that involves rearra
    7·2 answers
  • Which statement best describes the process that the diagrams show?
    6·2 answers
  • The half-life of a radioactive isotope is 20 minutes. What is the total amount of 1.00 g of sample of this isotope remaining aft
    6·1 answer
  • The bottom number on each element of a on the periodic table is called
    7·1 answer
  • “The chemical formula in the structure of phosphorus is shown below. This represents a(n)....”
    10·1 answer
  • Which statement best describes an electron
    9·2 answers
  • Magnesium +Hydrogen Phospahate
    12·2 answers
  • True or false: <br> The following equation is balanced properly: 6CO2 + 6H2O → C6H12O6 + O2
    12·1 answer
  • What's the IUPAC name pf this compound? CH3-CH-CH2-CH-CHO | | CH3 CL
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!